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lib: utils: Improve fdt_timer

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Remove dummy driver. Optimize fdt_timer_cold_init to exit the
loop early.

Signed-off-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Xiang W 2023-05-22 13:18:09 +08:00 • committed by Anup Patel
parent 9a0bdd0c84
commit 122f2260b3
1 changed files with 22 additions and 21 deletions
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43
lib/utils/timer/fdt_timer.c
View file

@ -16,24 +16,17 @@
extern struct fdt_timer *fdt_timer_drivers[];
extern unsigned long fdt_timer_drivers_size;
static struct fdt_timer dummy = {
.match_table = NULL,
.cold_init = NULL,
.warm_init = NULL,
.exit = NULL,
};
static struct fdt_timer *current_driver = &dummy;
static struct fdt_timer *current_driver = NULL;
void fdt_timer_exit(void)
{
if (current_driver->exit)
if (current_driver && current_driver->exit)
current_driver->exit();
}
static int fdt_timer_warm_init(void)
{
if (current_driver->warm_init)
if (current_driver && current_driver->warm_init)
return current_driver->warm_init();
return 0;
}
@ -51,20 +44,28 @@ static int fdt_timer_cold_init(void)
noff = -1;
while ((noff = fdt_find_match(fdt, noff,
drv->match_table, &match)) >= 0) {
if (drv->cold_init) {
rc = drv->cold_init(fdt, noff, match);
if (rc == SBI_ENODEV)
continue;
if (rc)
return rc;
}
current_driver = drv;
}
/* drv->cold_init must not be NULL */
if (drv->cold_init == NULL)
return SBI_EFAIL;
if (current_driver != &dummy)
break;
rc = drv->cold_init(fdt, noff, match);
if (rc == SBI_ENODEV)
continue;
if (rc)
return rc;
current_driver = drv;
/*
* We will have multiple timer devices on multi-die or
* multi-socket systems so we cannot break here.
*/
}
}
/*
* We can't fail here since systems with Sstc might not provide
* mtimer/clint DT node in the device tree.
*/
return 0;
}